Fan for sewing-machines



(No Model.)

M. KENNEDY.

PAN FOR SEWING MACHINES.

l 0.1 2 a. W a d e t H e t 3 P MW 3 3 2 0 6 4 N UNITED STATES PATENT OFFICE.

MICHAEL KENNEDY, OF PHILADELPHIA, PENNSYLVANIA.

FAN FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 460,233, dated; September 29, 1891.

Application filed June 29, 1891.

To all whom it may concern.-

Be it known that 1, MICHAEL KENNEDY, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Fan or Ventilating Device for Sewing-lilachines, of which the following is a specification.

The principal objects of mypresent invention are, first, to provide a sewing-machine with simple, durable, and comparatively inexpensive means for automatically fanning, ventilating, and cooling the sewing-machine operator; second, to apply a fan or ventilating device to a sewing-machine in such manner that it does not in anywise interfere with the proper manipulation of the machine, and, third, to provide compact and efficient devices for permitting of the application of a fan to a suitable rotating member of a sewing-machine and for permitting of its ready removal therefrom.

The invention consists of the improvements hereinafter fully described, and pointed out in the claims.

The nature and characteristic features of the invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, and in which Figure 1 is a side elevation of a sewing-machine, showing my invention in application thereto and illustrating in central section dc vices for detachably connecting the fan to a rotating member of the machine; and Fig. 2 is a central section of the fan, showing modified means for detachably connecting the fan with the sewing-machine.

In the drawings, a is a sewing-machine, of any preferred construction, mounted upon a base-plate or main frame a and provided with a rotating shaft (4 a is a pulley for operating the machine a, keyed or otherwise attached to the shaft a and provided with ahub a", of usual or of any preferred construction.

Having thus briefly indicated the parts of one of the many well-known types of sewing-machines to which my improvements are applicable, I will now proceed to describe the construction and operation of the parts comprising the fan or ventilating device.

Serial No. 397,797. (No model.)

pulley a in such manner that it may be conveniently applied thereto or removed therefrom. The leaves or vanes b of the fan I) are preferably offset, as at 11 so as to permit the operator to place his hand upon the periphery of the pulley a in order to stop or startthe machine without interfering with or touching the vanes or leaves of the fan. Of course the elongated hub 12 of the fan I) may be detachably applied to the extremity of the shaft a instead of to the hub a of the pulley a However, I will proceed to describe convenient devices which have been found practically efficient for detachably connecting the hub b of the fan with the hub a of the pulley.

Referring now to Fig. 1, the elongated hub 11 of the fan I) is split, so as to form several, preferably three, tongues c, and these tongues are bent or curved outward, as at c, and then inward, as at 0 so as to form a springclutch adapted for the reception of the hub a of the pulley a. Moreover this springclutch is adapted to yield and contract, and thus compensates for any irregularity that may occur in the sizes of the hubs of the pulleys of different machines. (Z is a collar adapted to be fitted over the spring-tongues 0, so as to force the same into close contact with the hub of the pulley, thus connecting the fan I) with the pulley in such manner that these two parts revolve together. Ilowever, the fan I) may be readily detached from the pulley by the simple operation of shifting the collar- (1 toward the right in Fig. 1, whereby the tongues c are released.

In the construction illustrated in Fig. 2the hub b of the fan 0 is provided with a flaring or conical hub I), and the extremityct of the hub of the pulley a is provided with a tapering bushing (1', adapted for the reception of the hub l) of the fan I). c is a washer attached to the extremity of the shaft a by means of a set-screw c, engaging a centrallylocated tapped orifice 6 This washer e engages a suitable offset or flange 1), formed upon the interior of the hub 19 of the fan I), and thus secures the latter to place upon the hub of the pulley, so that these two members revolve together. It may be remarked that the bushing d is preferably madein two or more sections, so that it may be clamped to place upon the hubs of wheels of different sizes. The fan 1) maybe removed from the hub of the pulley by the simple operation of unscrewing the set-screw e and drawing the fan 1) toward the right in the drawings.

Having thus described the nature and obj ects of my present invention, what I claim as new, and desire to secure by Letters Patent,

1. The combination, in a sewing-machine, of a rotating pulley, afan provided with vanes or leaves and having the hub thereof split or bifurcated and curved to form a spring-clutch for engaging the hub of the pulley, and a collar mounted on said bifurcated hub, substantially as and for the purposes set forth.

2. The combination, in a sewing-machine, of a rotating pulley, afan provided with vanes or leaves and having an adjustable hub for accommodating different-sized hubs of rotating pulleys, and means, as described, for clamping and unclamping the adjustable hub of the fan to and from the hubs of the rotating pulleys of different sizes, substantially as shown, and for the purposes set forth.

In witness whereof I have hereunto set my signature in the presence of two subscribing witnesses.

MICHAEL KENNEDY. WVitnesses:

RICHARD G. MAXWELL, THOMAS M. SMITH. 

